github.com/opencontainers/runc@v1.2.0-rc.1.0.20240520010911-492dc558cdd6/libcontainer/cgroups/fs/fs_test.go (about)

     1  package fs
     2  
     3  import (
     4  	"testing"
     5  
     6  	"github.com/opencontainers/runc/libcontainer/cgroups"
     7  	"github.com/opencontainers/runc/libcontainer/configs"
     8  )
     9  
    10  func BenchmarkGetStats(b *testing.B) {
    11  	if cgroups.IsCgroup2UnifiedMode() {
    12  		b.Skip("cgroup v2 is not supported")
    13  	}
    14  
    15  	// Unset TestMode as we work with real cgroupfs here,
    16  	// and we want OpenFile to perform the fstype check.
    17  	cgroups.TestMode = false
    18  	defer func() {
    19  		cgroups.TestMode = true
    20  	}()
    21  
    22  	cg := &configs.Cgroup{
    23  		Path:      "/some/kind/of/a/path/here",
    24  		Resources: &configs.Resources{},
    25  	}
    26  	m, err := NewManager(cg, nil)
    27  	if err != nil {
    28  		b.Fatal(err)
    29  	}
    30  	err = m.Apply(-1)
    31  	if err != nil {
    32  		b.Fatal(err)
    33  	}
    34  	defer func() {
    35  		_ = m.Destroy()
    36  	}()
    37  
    38  	var st *cgroups.Stats
    39  
    40  	b.ResetTimer()
    41  	for i := 0; i < b.N; i++ {
    42  		st, err = m.GetStats()
    43  		if err != nil {
    44  			b.Fatal(err)
    45  		}
    46  	}
    47  	if st.CpuStats.CpuUsage.TotalUsage != 0 {
    48  		b.Fatalf("stats: %+v", st)
    49  	}
    50  }